中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

201 records (took 0.023 seconds)

    Driver circuit with gate clamp supporting stress testing
    101.
    发明授权
    Driver circuit with gate clamp supporting stress testing 有权
    驱动电路与门夹支持压力测试

    公开(公告)号：US09331672B2

    公开(公告)日：2016-05-03

    申请号：US14449232

    申请日：2014-08-01

    Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.

    Inventor： Ni Zeng

    IPC: H03B1/00 ,  H03K3/00 ,  H03K3/011 ,  H03K17/687

    CPC classification number: H03K5/08 ,  G01R31/2621 ,  H03K3/011 ,  H03K17/08122 ,  H03K17/687

    Abstract: A generator circuit is coupled to apply a control signal the gate terminal of a power transistor driving an output node. A reference voltage is generated having a first voltage value as the reference for the control signal and having a second, higher, voltage value for use in stress testing. A clamping circuit is provided between the reference voltage and the power transistor gate to function in two modes. In one mode, the clamping circuit applies a first clamp voltage to clamp the voltage at the gate of the power transistor when the generator circuit is applying the control signal. In another mode, the clamping circuit applies a second, higher, clamp voltage to clamp the gate of the power transistor during gate stress testing.

    Abstract translation: 发电机电路被耦合以施加驱动输出节点的功率晶体管的栅极端子的控制信号。 产生参考电压，其具有第一电压值作为控制信号的基准，并具有用于应力测试的第二，较高的电压值。 在参考电压和功率晶体管栅极之间提供钳位电路，以在两种模式下起作用。 在一种模式中，当发电机电路施加控制信号时，钳位电路施加第一钳位电压以钳位功率晶体管的栅极处的电压。 在另一种模式下，钳位电路在栅极压力测试期间施加第二个较高的钳位电压来钳位功率晶体管的栅极。

    Methods and circuits to reduce pop noise in an audio device
    103.
    发明授权
    Methods and circuits to reduce pop noise in an audio device 有权
    减少音频设备弹奏噪音的方法和电路

    公开(公告)号：US09306523B2

    公开(公告)日：2016-04-05

    申请号：US14478531

    申请日：2014-09-05

    Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.

    Inventor： Ru Feng Du ,  Qi Yu Liu

    IPC: H04R3/00 ,  H03G3/34

    CPC classification number: H03F1/3205 ,  H03F1/0205 ,  H03F1/305 ,  H03F3/183 ,  H03F3/185 ,  H03F3/187 ,  H03F3/211 ,  H03F3/2171 ,  H03F3/2173 ,  H03F3/45179 ,  H03F2200/03 ,  H03F2200/351 ,  H03F2203/21106 ,  H03F2203/45151 ,  H03F2203/45156 ,  H03G3/345 ,  H03G3/348 ,  H04R3/002

    Abstract: A class D amplifier receives and amplifies a differential analog signal which is then differentially integrated. Two pulse width modulators generate pulse signals corresponding to the differentially integrated analog signal and two power units generate output pulse signals. The outputs the power units are coupled to input terminals of integrators via a resistor feedback network. An analog output unit converts the pulse signals to an output analog signal. The differential integration circuitry implements a soft transition between mute/un-mute. In mute, the integrator output is fixed. During the soft transition, the PWM outputs change slowly from a fixed 50% duty cycle to a final value to ensure that no pop noise is present in the output as a result of mode change.

    Abstract translation: D类放大器接收和放大差分模拟信号，然后差分模拟信号被差分地积分。 两个脉冲宽度调制器产生对应于差分集成模拟信号的脉冲信号，两个功率单元产生输出脉冲信号。 功率单元的输出通过电阻反馈网络耦合到积分器的输入端。 模拟输出单元将脉冲信号转换为输出模拟信号。 差分积分电路实现静音/非静音之间的软转换。 静音时，积分器输出是固定的。 在软转换期间，PWM输出从固定的50％占空比缓慢变化到最终值，以确保由于模式更改而导致输出中没有弹出式噪声。

    Silent start class-D amplifier
    104.
    发明授权
    Silent start class-D amplifier 有权
    静音启动D类放大器

    公开(公告)号：US09231535B2

    公开(公告)日：2016-01-05

    申请号：US14199773

    申请日：2014-03-06

    Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.

    Inventor： Ru Feng Du ,  Qi Yu Liu

    IPC: H03F3/38 ,  H03F3/217

    CPC classification number: H03F3/2171 ,  H03F3/2175

    Abstract: A Class-D amplifier includes a pre-amplifier having an input configured to receive an amplifier reference voltage signal which is ramped at start-up at a fast rate. An integrator has a first input configured to receive an input signal from the pre-amplifier and a second input configured to receive an integrator reference voltage signal which is ramped at start-up at a slower rate. A modulator has an input coupled to an output of the integrator. The modulator generates a pulse width modulated output signal. Operation of the Class-D amplifier is controlled at start-up by applying a slow ramped signal as the integrator reference voltage signal and a fast ramped signal as the amplifier reference voltage so that the pulse width modulated output signal exhibits an increasing change in duty cycle in response to an increasing voltage of the integrator reference voltage signal, and no “pop” is introduced at start-up.

    Abstract translation: D类放大器包括前置放大器，其具有被配置为接收在启动时以快速速率斜坡的放大器参考电压信号的输入。 积分器具有被配置为从前置放大器接收输入信号的第一输入和被配置为接收以较慢速率在启动时斜坡上升的积分器参考电压信号的第二输入。 调制器具有耦合到积分器的输出的输入。 调制器产生脉宽调制输出信号。 通过将缓慢斜坡信号作为积分器参考电压信号和快速斜坡信号作为放大器参考电压来控制D类放大器的工作，使得脉宽调制输出信号在占空比上呈现增加的变化 响应于积分器参考电压信号的增加的电压，并且在启动时不引入“弹出”。

    POWER CONVERTER AND METHOD FOR REGULATING LINE TRANSIENT RESPONSE OF THE POWER CONVERTER
    105.
    发明申请
    POWER CONVERTER AND METHOD FOR REGULATING LINE TRANSIENT RESPONSE OF THE POWER CONVERTER 有权
    用于调节电力转换器的线路瞬态响应的功率转换器和方法

    公开(公告)号：US20150378378A1

    公开(公告)日：2015-12-31

    申请号：US14663165

    申请日：2015-03-19

    Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

    Inventor： Hai Bo Zhang ,  Zi Yu Zeng ,  Jerry Huang

    IPC: G05F1/56

    CPC classification number: G05F1/56 ,  H02M1/4225 ,  H02M3/156 ,  H02M3/158 ,  H02M2001/0022

    Abstract: A power converter includes an input and an output with an energy storage circuit and a power switching circuit coupled between the input and the output. A feedback circuit generates a feedback voltage which is differentially compared to a reference in an error amplifier circuit to generate an error amplification signal. A comparator circuit generates a control signal for controlling on/off of the power switching circuit based on a first comparison signal related to the error amplification signal and a second comparison signal related to a charging current of the energy storage circuit. A regulating circuit is coupled between an output of the error amplifier circuit and an input of the comparator circuit for receiving the first comparison signal, the regulating circuit is configured to couple a voltage compensation signal related to an input voltage received by the input to an output of the error amplifier, so as to reduce a variation amount of the error amplification signal when the input voltage varies.

    Abstract translation: 功率转换器包括具有能量存储电路和耦合在输入和输出之间的功率开关电路的输入和输出。 反馈电路产生与误差放大器电路中的参考差分地相比较以产生误差放大信号的反馈电压。 比较器电路基于与误差放大信号相关的第一比较信号和与能量存储电路的充电电流相关的第二比较信号，产生用于控制功率开关电路的导通/截止的控制信号。 调节电路耦合在误差放大器电路的输出端和比较器电路的输入端之间，用于接收第一比较信号，调节电路被配置为将与输入接收的输入电压相关的电压补偿信号耦合到输出端 以便在输入电压变化时减小误差放大信号的变化量。

    LDO REGULATOR WITH IMPROVED LOAD TRANSIENT PERFORMANCE FOR INTERNAL POWER SUPPLY
    106.
    发明申请
    LDO REGULATOR WITH IMPROVED LOAD TRANSIENT PERFORMANCE FOR INTERNAL POWER SUPPLY 有权
    具有改进内部电源负载瞬态性能的LDO稳压器

    公开(公告)号：US20150185747A1

    公开(公告)日：2015-07-02

    申请号：US14543294

    申请日：2014-11-17

    Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

    Inventor： Yong Feng Liu

    IPC: G05F1/565 ,  G05F1/59 ,  G05F1/575

    CPC classification number: G05F1/575 ,  G05F1/565 ,  G05F1/59 ,  G05F3/30

    Abstract: A voltage regulator includes a feedback regulation loop and a drive transistor configured to source current to a regulated output. A transient recovery circuit is coupled to the voltage regulator circuit and includes a first transistor coupled to source current into a control terminal of the drive transistor, wherein the source current is in addition to current sourced in response to operation of the feedback regulation loop. The first transistor is selectively actuated in response to a drop in voltage at the regulated output. The transient recovery circuit further includes a second transistor coupled to sink current from the regulated output. The sink current has a first non-zero magnitude in the quiescent operating mode of the regulator circuit. In response to an increase in voltage at the regulated output, the operation of the second transistor is modified to increase the sink current to a second, greater, non-zero magnitude.

    Abstract translation: 电压调节器包括反馈调节环路和驱动晶体管，其被配置为将电流输出到调节输出端。 瞬态恢复电路耦合到电压调节器电路，并且包括耦合到源极电流到驱动晶体管的控制端的第一晶体管，其中源电流除了响应于反馈调节环的操作而产生的电流之外。 第一晶体管响应于调节输出处的电压下降而选择性地致动。 瞬态恢复电路还包括耦合到从调节输出吸收电流的第二晶体管。 灌电流在调节器电路的静态工作模式下具有第一个非零幅值。 响应于调节输出处的电压增加，第二晶体管的操作被修改以将吸收电流增加到第二，更大，非零的幅度。

    CIRCUIT AND METHOD FOR GENERATING OSCILLATING SIGNALS
    108.
    发明申请
    CIRCUIT AND METHOD FOR GENERATING OSCILLATING SIGNALS 有权
    用于产生振荡信号的电路和方法

    公开(公告)号：US20140184345A1

    公开(公告)日：2014-07-03

    申请号：US14073198

    申请日：2013-11-06

    Applicant: STMicroelectronics (Shenzhen) R& D Co. Ltd.

    Inventor： Hong Wu LIN

    IPC: H03B5/02

    CPC classification number: H03K3/0231

    Abstract: An oscillator module includes a first MOS transistor and a capacitor. The capacitor is coupled between a gate and source of the first MOS transistor. The drain of the first MOS transistor receives a first bias current and generates an oscillating output signal. A switching circuit operates in response to the oscillating output signal to selective charge and discharge the capacitor. A current sourcing circuit is configured to generate the bias current. The current sourcing circuit includes a second MOS transistor which has an identical layout to the first MOS transistor and receives a second bias current. A resistor is coupled between a gate and source of the second MOS transistor. The current sourcing circuit further includes a current mirror having an input configured to receive a reference current passing through the resistor and generate the first and second bias currents.

    Abstract translation: 振荡器模块包括第一MOS晶体管和电容器。 电容器耦合在第一MOS晶体管的栅极和源极之间。 第一MOS晶体管的漏极接收第一偏置电流并产生振荡输出信号。 开关电路响应于振荡输出信号而工作以对电容器进行选择性充电和放电。 电流源电路被配置为产生偏置电流。 电流源电路包括与第一MOS晶体管具有相同布局并接收第二偏置电流的第二MOS晶体管。 电阻器耦合在第二MOS晶体管的栅极和源极之间。 电流源电路还包括电流镜，其具有被配置为接收通过电阻器的参考电流并产生第一和第二偏置电流的输入。

    Inverter and method to measure junction temperature for thermal protection
    110.
    发明授权
    Inverter and method to measure junction temperature for thermal protection 有权

    公开(公告)号：US12264976B2

    公开(公告)日：2025-04-01

    申请号：US17836817

    申请日：2022-06-09

    Applicant: STMicroelectronics (Shenzhen) R&D Co., Ltd. ,  STMicroelectronics (China) Investment Co., Ltd.

    Inventor： Dino Costanzo ,  Yan Zhang ,  Guixi Sun

    IPC: G01K7/01 ,  G01K3/00 ,  G01K7/16 ,  G01K7/18

    Abstract: A three-phase load is powered by an SPWM driven inverter having a single shunt-topology. During operation, drain-to-source resistances of transistors of each branch of the inverter are determined. Interpolation is performed on assumed drain-to-source resistances of the transistors for different temperatures to produce a non-linear model of drain-to-source resistance to temperature for the transistors, and the drain-to-source resistances determined during operation and the non-linear model are used to estimate temperature values of the transistors. Driving of the inverter can be adjusted so that conductivity of each branch is set so that power delivered by that branch is as high as possible without exceeding an allowed drain current threshold representing a threshold junction temperature. In addition, driving of the inverter can be ceased if the temperature of a transistor exceeds the threshold temperature.

Patent Agency Ranking